CVE-2023-28319

Exp

A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH server's public key using a SHA 256 hash. When this check fails, libcurl would free the memory for the fingerprint before it returns an error message containing the (now freed) hash. This flaw risks inserting sensitive heap-based data into the error message that might be shown to users or otherwise get leaked and revealed.

Published: 2023-05-26 Last update: 2025-01-15 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-28319 is rated High Exploit Risk (64.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.32%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2023-28319

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2023-28319

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-04 0.15% 0.32% +0.17%
2 2026-03-01 0.32% 0.15% -0.17%
3 2026-02-04 — 0.32% —

Full EPSS history (31 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-28319

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-28319

OS Trackers for CVE-2023-28319

vendor priority summary link
alpine — CVE-2023-28319: 1 source package rows (curl); 182 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 175. https://security.alpinelinux.org/vuln/CVE-2023-28319
debian unimportant CVE-2023-28319 unimportant priority: Debian including 1 source packages (curl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2023-28319
gentoo high CVE-2023-28319: 1 GLSA(s) (202310-12), 1 atom(s) (net-misc/curl); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2023-28319
redhat medium — https://access.redhat.com/security/cve/CVE-2023-28319
suse medium CVE-2023-28319 severity moderate: SUSE including 345 source package names (0.58.0.1.264:libcurl4-8.0.1-150400.5.23.1, 0.58.0.17.247:curl-8.0.1-150400.5.23.1, …), 858 product×package rows across 274 product lines (Container bci/bci-init, Container bci/dotnet-aspnet, … (274 product lines)): Fixed 577, Known Affected 161, Known Not Affected 120. https://www.suse.com/security/cve/CVE-2023-28319/
ubuntu medium CVE-2023-28319 medium priority: Ubuntu including 1 source packages (curl), 8 status rows across 8 suites (bionic, focal, jammy, kinetic, lunar, trusty, upstream, xenial): not-affected 7, released 1. https://ubuntu.com/security/CVE-2023-28319

Affected software / configurations for CVE-2023-28319

Vendor Product Version Raw CPE
haxx curl < 8.1.0 cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
apple macos >= 11.0, < 11.7.9 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos >= 12.0, < 12.6.8 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos >= 13.0, < 13.5 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
netapp clustered_data_ontap — cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*
netapp ontap_antivirus_connector — cpe:2.3:a:netapp:ontap_antivirus_connector:-:*:*:*:*:*:*:*
netapp h300s_firmware — cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
netapp h500s_firmware — cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
netapp h700s_firmware — cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
netapp h410s_firmware — cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*

References for CVE-2023-28319

URL Tags
http://seclists.org/fulldisclosure/2023/Jul/47 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2023/Jul/48 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2023/Jul/52 Mailing List Third Party Advisory
https://hackerone.com/reports/1913733 Exploit Patch Third Party Advisory
https://security.gentoo.org/glsa/202310-12 Third Party Advisory
https://security.netapp.com/advisory/ntap-20230609-0009/ Third Party Advisory
https://support.apple.com/kb/HT213843 Third Party Advisory
https://support.apple.com/kb/HT213844 Third Party Advisory
https://support.apple.com/kb/HT213845 Third Party Advisory
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